//------------------------------------------------------------------------------
//  此代码版权（除特别声明或在XREF结尾的命名空间的代码）归作者本人若汝棋茗所有
//  源代码使用协议遵循本仓库的开源协议及附加协议，若本仓库没有设置，则按MIT开源协议授权
//  CSDN博客：https://blog.csdn.net/qq_40374647
//  哔哩哔哩视频：https://space.bilibili.com/94253567
//  Gitee源代码仓库：https://gitee.com/RRQM_Home
//  Github源代码仓库：https://github.com/RRQM
//  API首页：https://touchsocket.net/
//  交流QQ群：234762506
//  感谢您的下载和使用
//------------------------------------------------------------------------------

using System;
using System.Collections.Generic;
using System.Net;
using System.Threading;
using System.Threading.Tasks;
using TouchSocket.Core;

namespace TouchSocket.Sockets;

/// <summary>
/// 常规UDP数据处理适配器
/// </summary>
public class NormalUdpDataHandlingAdapter : UdpDataHandlingAdapter
{
    /// <inheritdoc/>
    public override bool CanSplicingSend => true;

    /// <inheritdoc/>
    public override bool CanSendRequestInfo => false;

    /// <inheritdoc/>
    /// <param name="remoteEndPoint"></param>
    /// <param name="byteBlock"></param>
    protected override Task PreviewReceived(EndPoint remoteEndPoint, IByteBlockReader byteBlock)
    {
        return this.GoReceived(remoteEndPoint, byteBlock, null);
    }

    ///// <summary>
    ///// <inheritdoc/>
    ///// </summary>
    ///// <param name="endPoint"></param>
    ///// <param name="buffer"></param>
    ///// <param name="offset"></param>
    ///// <param name="length"></param>
    //protected override void PreviewSend(EndPoint endPoint, byte[] buffer, int offset, int length)
    //{
    //    this.GoSend(endPoint, buffer, offset, length);
    //}

    ///// <inheritdoc/>
    //protected override void PreviewSend(EndPoint endPoint, IList<ArraySegment<byte>> transferBytes)
    //{
    //    var length = 0;
    //    foreach (var item in transferBytes)
    //    {
    //        length += item.Count;
    //    }

    //    this.ThrowIfMoreThanMaxPackageSize(length);

    //    using (var byteBlock = new ByteBlock(length))
    //    {
    //        foreach (var item in transferBytes)
    //        {
    //            byteBlock.Write(item.Array, item.Offset, item.Count);
    //        }
    //        this.GoSend(endPoint, byteBlock.Buffer, 0, byteBlock.Len);
    //    }
    //}

    /// <inheritdoc/>
    [Obsolete("该接口已被弃用，请使用SendAsync直接代替")]
    protected override async Task PreviewSendAsync(EndPoint endPoint, IList<ArraySegment<byte>> transferBytes)
    {
        var length = 0;
        foreach (var item in transferBytes)
        {
            length += item.Count;
        }

        this.ThrowIfMoreThanMaxPackageSize(length);

        using (var byteBlock = new ByteBlock(length))
        {
            foreach (var item in transferBytes)
            {
                byteBlock.Write(new ReadOnlySpan<byte>(item.Array, item.Offset, item.Count));
            }
            await this.GoSendAsync(endPoint, byteBlock.Memory,CancellationToken.None).ConfigureAwait(EasyTask.ContinueOnCapturedContext);
        }
    }
}